Hóa chất L-Histidine monohydrochloride monohydrate cho hóa sinh Merck 1043500500 (C₆H₁₀ClN₃O₂ * H₂O, Chai nhựa 500g) DEEP52 https://yeuhangduc.vn/

CAS number: 5934-29-2

EC number: 211-438-9

Hill Formula: C₆H₁₀ClN₃O₂ * H₂O

Molar Mass: 209.63 g/mol

Assay (calculated on dried substance): 99.0 - 101.0 %

Identity (IR-spectrum): passes test

Identity (wet chemistry): passes test

Appearance: white to almost white crystalline powder or colorless crystals

Appearance of solution (50 g/l CO₂-free water): clear and not more intense in color than reference solution BY₆

Spec. rotation (α 20/D, 110 g/l, hydrochloric acid 120 g/l, calc. on dried substance): +9.2 to +10.6

Sulfate (SO₄): ≤ 200 ppm

Heavy metals (as Pb): ≤ 10 ppm

As (Arsenic): ≤ 5 ppm

Ca (Calcium): ≤ 10 ppm

Co (Cobalt): ≤ 5 ppm

Fe (Iron): ≤ 5 ppm

K (Potassium): ≤ 5 ppm

Mg (Magnesium): ≤ 5 ppm

Na (Sodium): ≤ 50 ppm

Zn (Zinc): ≤ 5 ppm

Ninhydrin-positive substances (LC) (any ninhydrin-positive impurity): ≤ 0.2 %

Ninhydrin-positive substances (LC) (ammonium (570 nm)): ≤ 0.02 %

Ninhydrin-positive substances (LC) (total impurities): ≤ 0.5 %

Loss on drying (150 °C): 7.0 - 10.0 %